Furnace for steam-boilers



2 Sheets-Sheet 1.`

(No Model.)

A. HBBBRBR. Y FURNAGE FOR STEAM BOILBRS.

No. 464,155. Patented Dec. 1,1891.

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2 Sheets--Sheet 2.

.A.HEBBRBR. PURNAGE FOR STEAM BOILERS.

Patented Deo. 1,1891.

UNITED STATES- vPATmvT OFFICE.

ADAM HEBERER, OF ALAMEDA, CALIFORNIA.

FURNACE FOR 'STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 464,155, dated December 1 1891.

Application filed March 6, 1889. Serial No. 302,167. (No model.)

To all whom it may concern:

Be it known that I, ADAM HEBERER, a citizen of the United States, residing in Alameda, in the county of Alameda and State of California, have invented certain new and useful Improvements in Furnaces for Steam-Boilers, of which the following is a specification.

My invention relates to improvements in coal-burning furnaces for steam-boilers; and it has for its object to secure more complete and effective consumption of those portions of the fuel and products of combustion therefrom which are ordinarily lost or carried off in an imperfectly-consumed state in the furnaces most generally used and the methods of firing commonly employed at the present time.

These improvements are applicable both to steanrboilers of the horizontal and the vertical or upright kind, and they consist in certain novel construction and combination of twin furnaces or nre-boxes, as hereinafter explained.

The accompanying drawings illustrate the manner in which I construct and apply my inveniion to two different types or styles of boilers, Figures 1 to 4, inclusive, showing the construction which is adapted for upright boilers, and Figs. 5 and 6 representing the manner of applying the invention toa horizontal boiler.

Fig. 1 is a view in vertical longitudinal section of the furnace for an upright boiler. Fig. 2 is a transverse section taken through one of the nre-chambers on the line @c m, FigA l:

Fig. 3 shows a vertical section on the line fy, and Fig. 4 is a top view of the furnace, showing the air-heating passages in the Walls. Fig. 5 is a cross-section taken in a vertical plane through the furnace that is arranged for use with ahorizontal boiler, and Fig. 6 is alongitudinal section taken through this lastmentioned figure on the line y y e'.

In that form of a furnace'which I consider the best adapted for the upright boiler or generator the two ire-chambersare arranged on opposite sides of a dividing-wall that extends transversely across the furnace, and the openings to admit fuel and the apertures in the ash-pit are located at opposite ends of the furnace. This arrangementis varied for the horizontal type of boiler, and also in such cases `of application where the peculiar situation or surroundings may not permit convenient access at both ends or sides to the furnace-doors, and in these cases the t'wo firechambers are placed side by side uwith the dividing-wall running longitudinally,and the openings for fuel and draft located in the same end of the furnace. A A are-the two lire-chambers, and B B their grate-surfaces. The dividing-wall O between them extends from the oor of the ashpits A2 A2 up to within a short distance from the top of the furnace, leaving a clear space along the top edge of the wall,through which the fire and products of combustionfrom either chamber meet and combine with those from the otherchamber. This passage or space CX is also in communication with or delivers directly into the fire-space D, that eX- tends through or beneath the boiler, the furnace for the horizontal boiler having a coinbustion-chamber -D over the arched tops of the two fire-chambers for the full length of the middle dividing-wall with an outlet at y upward from an air conduit or passage GX,

that opens to the outside atmosphere through the walls vof the furnace. Similar air-conducting passages II II are formed in the top of the furnace with apertures IIx, delivering through the crown of the chamber D down` ward into the space, and additional passages are also arranged in the side walls to lead in air from the outside under the gratefsurfaces. All these passages are designed not only to deliver air in a direct manner into the com'- bustion. spaces or c hambers for effective combustion with the gases and products from the fuel,but also to raise the temperature of such jets or streams of air before they enter the furnace.

In the operation of this furnace the chambers A' A are fired alternately, so that while one is being charged with fresh fuel the other -ICQ is in such advanced stage of combustion that the heat and incandescent condition of its fuel assist in the thorough combustion of the gases and products from the fresh fuel as they pass over the dividing-Wall. The smokeand products from one fire are thus caused to pass over and become consumed by the other lire, the operation being made more effective and complete by the introduction of air atthe pointof mixture or combustion. The aireonducting passages are carried in fromv the front through the brick-Work, and are furV nished With dampers for regulating the supply of air, if found necessary. The openings in the front of the re-chambers and ash-pits are provided with suitable doors to close up the furnace when the fires 4are Well punder way, at which time the air for `combustion lis drawn Ainto the furnaces throughthe air-passages before mentioned.

Having .thns fully described my invention, what I claim, and ldesire to secure by Letters` Patent, is

l. In .a .furnace of .the kind described, the combination of the furnace masonry or housing, a central division walhhhollow, 'as described, separate feed and pit doors and separate grate-surfaces for. eachside of the central division -WalL a common combustionehamber above said division-Wall, and passages or ducts leading from the dome on each side of the exit-passage through'the furnace,

masonry 'to points beneath the grate-surfaces 0n the opposite sides of the division-Wall, as

set forth.

ADAM I-IEBERER. .[L. s] Witnesses:

Jos. FORD, CHAs. KELLY. 

